Move a private x86-64 header file out of the limelight.
authorElliott Hughes <enh@google.com>
Thu, 27 Nov 2014 03:31:19 +0000 (19:31 -0800)
committerElliott Hughes <enh@google.com>
Thu, 27 Nov 2014 03:31:19 +0000 (19:31 -0800)
Currently this is on everyone's include path and is getting exported
via the NDK.

Change-Id: Ia417839fb65c7e0afddcd9fae3438665dae8e752

libm/include/amd64/machine/fpu.h [moved from libc/arch-x86_64/include/machine/fpu.h with 100% similarity]